Which circuit type uses contact-based logic for determining operations?

The circuit type that uses contact-based logic for determining operations is the selector circuit. Selector circuits are designed to choose one or more inputs in a predetermined manner, often based on the position of physical contacts (like switches or relays) that can open or close pathways for electrical current. This contact-based approach allows for the selection and routing of signals in a clear and controllable way.

In selector circuits, physical contacts can be arranged to create specific paths that correspond to desired outputs, making them effective in situations where discrete choices need to be made based on user input or predefined criteria. This functionality is crucial in various applications, such as audio/video equipment, telecommunications, and control systems, where selecting inputs is a common requirement.

Other circuit types have different operational principles. Logic circuits are typically based on binary logic states (high or low) and use digital representations without necessarily relying on physical contacts for decision-making. Digital circuits, which operate on discrete levels (typically binary), may utilize electronic components like transistors instead of physical contacts to conduct logic operations. Analog circuits, on the other hand, process continuous signals, relying on varying levels of voltage or current rather than distinct states determined by contacts.